I think that it's pretty mixed as far as cost benefit goes. Many of the IP practices in the field are odious at best, not being able to sell produce as organic or overseas in the case of genetic contamination of non gmo crops is a pain in the ass. I also think that there isn't a lot of transparency about the impacts of things like roundup resistant insects and excessive use of roundup like chemicals on the food chain. GMO offers a lot of hope for providing safe and healthy food to feed expanding populations, it's also mostly being controlled by a group of corporate stakeholders that put profits before the environment and consumer safety. In an ideal world GMO would be used in a way that is a boon for the environment, health and nutrition, food security and safety, but at this point I don't think it's mostly a profit game with societal benefit as mixed bag.